1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/rtlil.h b/kernel/rtlil.h
index 51a3fad6f..be558932f 100644
--- a/kernel/rtlil.h
+++ b/kernel/rtlil.h
@@ -479,6 +479,10 @@ struct RTLIL::Const
 	inline RTLIL::State &operator[](int index) { return bits.at(index); }
 	inline const RTLIL::State &operator[](int index) const { return bits.at(index); }
 
+	bool is_fully_zero() const;
+	bool is_fully_def() const;
+	bool is_fully_undef() const;
+
 	inline RTLIL::Const extract(int offset, int len = 1, RTLIL::State padding = RTLIL::State::S0) const {
 		RTLIL::Const ret;
 		ret.bits.reserve(len);